Angular Security - Authentication With JSON Web Tokens (JWT)
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Angular Security – Authentication With JSON Web Tokens (JWT)

We can preferably generate the tokens based on the backend service we require for an application but basically JWT token needs to be generated in back-end server of the application. So today, let’s focus on creating angular security with help of JSON Web Tokens (JWT). Will also see how we can automate the tokens and things up so you don’t have to necessarily bother about calling the authentication file for every time.

If you’re building an application with Node.js, you can also refer how I have secured NodeJS RESTful API with JSON web token here,

How To Secure Node.js RESTful APIs With JSON Web Tokens

Now, let’s see how we can use Auth Tokens In Angular Application,

Steps To Use Auth Tokens In Angular Application Using Request Params


Step 1: Get an auth token

Post this to get an auth token.


after posting this you will get the responce data which will get you a token like this,

Response data:



Step 2: Login Component

Prior to everything, we need to get user input email & password to get the auth token so here we’re going to get this details using post request to the login service.





In our case used to onLogin function to collect the user input email & password and to call the authService followed by login function.

Note: The AuthService is a service component, which is used to write a common function and to access all component. Here main purpose for call the login service and get the JWT token and am going to keep it for further request till user logout or time expires. Also explained functions for Logout, SetAuthTime, SaveAuthData, ClearAuthData

Step 3: auth.service.ts 


The following code used to request the user login params and to get the login response with help of JWT token.


Store the response JTW token to local storage.


Now its time to know how to get the JWT token and will also see how we can store it in local storage so we can access it later whenever you want. Eventually, you can do this using Interceptor but in our case, am writing auth.interceptor.ts file to achieve this,

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Step 4: Writing auth.interceptor.ts


That’s all guys! its simple as like that. Please clearly follow these crisp steps to add more security to your angular application using JWT Tokens. Post us your queries in comment section, would like to hear from you!

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